Question

Assertion
In imbricate aestivation, out of five petals, one is completely internal, one is completely external and in each of the remaining three petals, one margin is internal and the other is external.
Reason
Ascending imbricate aestivation is found in Cassia and Gulmohur.
A)Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B)Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C)Assertion is correct but Reason is incorrect
D)Both Assertion and Reason are incorrect

Answer 1

Aestivation or estivation is the positional arrangement before the parts of a flower inside a flower bud have opened up. Aestivation is sometimes referred to as prefoliation or prefoliation, although these words can also indicate vernation: the arrangement within the leaves' vegetative buds.

Complete answer:
Aestivation or estivation is the positional configuration until it has opened of the sections of a flower inside a flower bud. Aestivation is often referred to as prefoliation or prefoliation, but vernation may also mean these terms: the structure inside a vegetative bud of leaves. In imbricate aestivation, one petal is completely inside and one is fully outside. The remaining perianth members see one edge inside and the other edge outside and are broken into two types of descending imbricate and ascending imbricate. Examples include Gulmohar and Cassia.

There are four key forms of entertainment. They are the following:
a) Valvate aestivation:
b) Twisted aestivation
c) Imbricate aestivation
d) Vexillary aestivation

Hence, the correct answer is option (B)

Note:
1. These four differences help us to distinguish between species easily.
2. Every family has its own characteristic aestivation.